package com.java3_13;

//工具类
public class MyMath {
    private MyMath() {
    }

    public static int add(int x, int y) {
        return x + y;
    }
    public static int del(int x, int y) {
        return x - y;
    }
    public  static int mul(int x, int y) {
        return x * y;
    }
    public  static int div(int x, int y) {
        return x / y;
    }
}
